Chilian mill.



1D'. E. VAN s111111.v J GHILIAN MILL. m j] APPLICATION FILED JUNE 15,1910.

rHENoRRls PETERS co., WASHINGTON. :1.ay

revolution of the rolls.

UNTTED sTATEs PATENT oEEIcE.

:PETER EDWIN VAN SAUN, 0F NEW YORK, N. Y., ASSIGNOR TO MILL NED SMELTERENGINEERING COMPANY, OE NEW YORK, N, Y.. A COPARTNERSHIP.

CHILIAN MILL.

Specication of Letters Patent4 Patented Feb. 28, 1911.

Application filed June 15, 1910. Serial No. 567,043.

To all whom it may concern:

Be it known that I, IETER EDWIN. VAN SAUN, citizen of the United States,residing at New York, N. Y., have invented certain new and usefulImprovements in Chiliau Mills, of which the following is a speciication.

My present invention relates to improvements in crushing mills orchasing mills, and has among its objects to provide a mill of increasedeconomy of manufacture, eiiieiency and durability.

I have particularly aimed to provide a simple manner of mounting therolls and so that while free to move upwardly and return, theirdisplacement will be such that the axis of the rolls will be kept in allpositions in planes which are parallel, the movement of the axis in suchdisplacement being such as to continuously lie in a plane eitherparallel to or coinciding with the axis of I have also aimed to providea construction which, when a roll has been raised unduly by a piece orlump of coarse material, will cause the roll to exert additionalcrushing force or effect.

My invention includes the novel features of construction and arrangementand combination of parts hereinafter described and particularly setforth in the appended claims.

A mill in accordance with my invention is illustrated in theaccompanying drawings, in which Figure 1 is a plan view of the mill,Fig. 2 is a vertical sectional elevation through the axis of the mill,Fig. 3 is an enlarged sectional view through a portion only; Fig. a is asection on line lle-t of Fig. 3.

The numerals 5, 5, designate timbers or sills which are rep-resentativeof any suitable supporting means upon which is mounted the base 6 of themill which is hollow to contain the driving gears. The pan or mortar forreceiving the ore to be crushed is indicated at 7, and contains theusual circular die ring or track 8. The central portionof the pan isprovided with an elongated bearing sleeve or member 9, within which isrotatably located a vertical driving shaft 10, receiving motion throughgears 11 and 12 from driving pulley 13 or the like in the ordinary orany desired manner. Gear 11 is fitted with a feather key engaging aspline shaft 10 for driving the latter, ut

suitable bearings 18.

permitting vertical movement of the shaft through the gear. The drivinghead 14 is keyed to shaft 10 and additionally held from verticalmovement on the shaft by being shouldered against bolted washer plate 15and nuts 1G engaging a reduced portion ofl shaft 10, although it may besecured to the shaft by any other suitable means.

lWhen not in operation, the weight of the driving head and itspertaining parts is carried by shaft 10 as hereinafter described, butwhen in operation its weight may be overcome by the upward forceexerted, due to the centrifugal action of the rollers. Therefore tocause shaft 10 to be able to resist either an upward or downward force Iuse the following arrangement of parts: At the lower end of shaft 10 issecured a thrust collar 17 by which either upward or downward motion isresisted by ball or other These bearings are contained in a case 19 withupwardly extending sleeve which is threaded externally to engage similarthreads in worm wheel 20. Bracket 21 which is secured to base 6 and alsothe center portion of the base are bored to allow sleeve 19 to freelyslide vertically therein. Sleeve 19 is splined, and engages a featherkey 22 secured in bracket 21 so that rotation of the sleeve isprevented. -It is therefore evident that by rotating worm wheel 20 theupward or downward motion of sleeve 19 and accordingly shaft 10 may beeffected either with the machine in operation or not, and by so doingthe vertical position of driving head 14e may be regulated. A worm 23fixed to shaft 24e fitted with hand wheel 25 outside of the base of themachine furnishes convenient means for accomplishing this regulation.

The driving head carries -a plurality of receiving boxes 26 preferablythree in number, to the side walls of which are pivotally connected bybearing pins 27 the pairs of links 28, the opposite ends of these linksbeing pivotally connected with the sides of the journal boxes 29 inwhich the roll shafts 30 are journaled, these roll shafts carrying attheir outer ends the ordinary rolls 31. It will thus be seen that thejournal box of each roll shaft is so connected with the driving headthat the roll is capable of a free, upward and downward movement, andthat the weight of the roll rests upon the material to be crushed. Atthe same time when the roll rises by reason of any lumps or large piecesresting upon the ring, the roll shaft or axis does not tilt but risesbodily by reason of its journal being connected to the dr'iving head bythe two pairs of links, so that whether the roll rises by reason ofobstructions or lowers abnormally, by reason of wearing away of itssteel tire or the track ring, its axis is always maintained in ahorizontal position, and the surface of its tire always parallel to thatof the track ring in the mortar. It will also be noticed that the meansbefore described for regulating` the vertical position of the drivinghead is suoli that the normal act-ion of the links may be maintainedwithin their proper operating limits.

It will be noticed that the links are so arranged that they inclineupwardly and outwardly from the point of connect-ion with the drivinghea-d. The result of this is that a portion of the centrifugal forceresulting from the revolving rollers is added to the downward pressuredue to their weight and thus utilized in crushing. The amount of thisadded force increases as the angle of the links from the horizontalbecomes greater. The useful result of this action is that when a roll islifted by reason of a large lump or piece of material on the track ringas indicated for instance by dot and dash lines in Fig. 8, the linksassume an increased angular position and cause a greater proportion ofthe centrifugal force to augment the weight of the roll, therebyexerting a greater crushing effect upon the large lumps or pieces. Thejournal boxes 20 are preferably provided with covers B2 to protect thecontained parts.

Having thus described my invention what I claim is:

l. In combination a pan or mortar, a driving head, crushing rolls havingsuitable shafts or axles, with their axes located in vertical planespassing through the axis of (i, the driving head, and connecting meansinterposed between said .head and shafts or axles, and permittingver'ical movement of said shafts or axles with r lation to the headwhile causing them to be revolved bodily with the driving` headyllsaidmeans being constructed and adapted-to hold said shafts or axles withtheir axes in vertical. alinement with the axis of the driving headduring the rise and fall of the shafts or axles and also to hold them atall times parallel with the face of the die ring, substantially asdescribed..

2. In combination with a pan or mortar, a drive head, rolls havingsuitable supporting shafts or axles, and a driving connection betweenthe drive head and said roll shafts or axles comprising a plurality oflpairs of links arranged in planes parallel to the axis of the respectiveroll shaft, substantially as described.

3. In a combination a pan or mortar, a drive head, a shaft or axle box,a plurality of pairs of links pivoted respectively to the said box andthe drive head, a roll shaft journaled in said box, and a roll carriedby said shaft or axle and enacting with the pan, said pairs of linkslying in planes parallel to the axis of the roll shaft, substantially asdescribed.

4. In combination a pan or mortar, a drive head, a journal box orbearing, a pair of links on each side of said journal box or bearingconnecting the sameto the drive head, said links inclining upwardly andoutwardly, a roll shaft journaled in the bearings, and a roll carried bysaid shaft, substantially as described.

In testimony whereof, I aix my signature in presence of two witnesses.

PETER EDWIN VAN SAUN.

Witnesses FRANK W. HOPKINS. REIN HARDT PETTERsoN.

Copies of this patent may be obtained for-five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

